Date: 29-03-24  Time: 00:52 am

Author Topic: Help - speedo/electric problem  (Read 1719 times)

3legs

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Help - speedo/electric problem
« on: 24 May 2015, 01:47:48 pm »
I bought a 1999 fazer a few weeks ago and have a speedo issue.

A few days ago, the speedo needle suddenly went crazy and started to go round to 160mph down country lanes! (you should see the milometer fly by at that speed)

It would sometimes settle down and work correctly. A few days later, it didn't work at all so I took the front wheel off and both lugs had gone. Bought a new rotor and fitted it yesterday.

Today went for a ride but no joy, no speed showing. The rev counter has been working fine throughout all this. Anyway , was giving it some stick over the mountain and the rev counter started playing up going to nil and then back to normal.

The bike goes really well, starts first time and the battery seems to be charging ok.

Could this issue be something to do with the regulator/rectifier over producing a charge? or is it maybe the main speed sensor. the fact that the rev counter started to play up seems to point to an electrical issue. When the pace slowed down, the rev counter was fine

Funny enough, when I got the bike, both rear side lights and the front headlight had blown - I did replace all these bulbs and they have been fine since

any ideas chaps?

This is my 3rd fazer, and it is very smooth and does go well.

Many thanks

darrsi

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Re: Help - speedo/electric problem
« Reply #1 on: 24 May 2015, 02:35:37 pm »
When you say the rev counter was going back to normal, are you sure it wasn't going to a specific place, like 0rpm to 3000rpm?


Might be a TPS issue?
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3legs

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Re: Help - speedo/electric problem
« Reply #2 on: 24 May 2015, 03:42:58 pm »
The rev counter just went to zero and then back to whatever revs I was doing, about 8 or 9 thou -  I was giving it stick.


darrsi

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Re: Help - speedo/electric problem
« Reply #3 on: 24 May 2015, 03:52:40 pm »
Do a check anyway to rule it out, it only takes a minute to do.


http://foc-u.co.uk/index.php/topic,13864.msg156715.html#msg156715
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3legs

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Re: Help - speedo/electric problem
« Reply #4 on: 24 May 2015, 04:05:33 pm »
ok, will do thanks

3legs

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Re: Help - speedo/electric problem
« Reply #5 on: 24 May 2015, 04:35:55 pm »
just checked the TPS and it went to 10000

Adjusted it to 5000 and took it for a run. The bike ran as normal and the rev counter was ok (but was ok when I reduced the revs on my earlier ride) but speedo still not working.

Just had a close look at the actual cable and there is a nick in the insulation but I can't see that it has nicked the wire(s) inside. The cable was routed inside between the brake hose and the fork lug.

Could it be that one of the wires is broken? and would it be worth cutting whole thing open and making sure wires are connected? Don't really want to fork out for whole new speedo cable/sensor.





darrsi

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Re: Help - speedo/electric problem
« Reply #6 on: 24 May 2015, 04:48:21 pm »
Keep checking the TPS occasionally, and keep an eye on the rev counter as well, as the TPS can break down rather than just stop working, you won't notice it so much when giving the bike a bit of welly, but overall it won't feel quite right.


If the speedo isn't working you haven't got much to lose by investigating further anyway.


I presume the new lugs all went back in the right position?
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3legs

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Re: Help - speedo/electric problem
« Reply #7 on: 24 May 2015, 05:23:51 pm »
I did try to ensure the lugs were in the correct position. but it's not easy lining then up and putting the spindle back in on your own.

Hopefully they were aligned ok.

Cheers

fazerboy01

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Re: Help - speedo/electric problem
« Reply #8 on: 30 May 2015, 06:58:22 am »
I've got a 2001 FZS600S and had a similer issue, turned out to be a brake in 1 of the 3 wires in the speedo cable between the wheel and where it connects to the loom, I cut out the bad section, soldered in a new bit, using heat shrink and electrical tape to seal the joints, and BOOM all sorted

the cueball

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Re: Help - speedo/electric problem
« Reply #9 on: 30 May 2015, 12:24:37 pm »
I had the same issue and turned out the be the cable had been sliced as well...


10 minutes soldering the 3 wires back up and everything works as it should.


 ;)